Illustration of the relative positions of the RPMS1, BARF0, and RK-BARF0 ORFs within BART transcripts and the location of the PCR primers used to detect RPMS1- and BARF0-containing cDNAs. The sequence and coordinates of the primers are listed in Table 1. The 22.2 and RK1 cDNA clones have been previously reported.39 40